Given a spring with 2.032 mm wire diameter, oil tempered, 8 active coils, OD i 8.5 mm. Determine the free length if the stress will not exceed 820 MPa when spring is compressed solid. Use G 83 MPa and assume the springs has pla = ends. a. 51.6 mm b. 41.6 mm c. 31.6 mm d. 21.6 mm
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